Back to your test review

Cornelius van Niel's studies on purple and green bacteria showed that photosynthesis is essentially a process in which

  • (a) light directly converts CO2 into sugar Your answer
  • (b) hydrogen from an oxidisable compound reduces CO2 Correct
  • (c) CO2 is split by light to release O2 Your answer
  • (d) O2 combines with glucose to release energy Your answer
Your answer: Correct answer: (b)
Advertisement

Explanation

Why (b) is correct

Van Niel showed that photosynthesis is a light-dependent reaction in which hydrogen from a suitable oxidisable compound reduces CO2 to carbohydrate. In green plants the hydrogen donor is water.

Why the other options are wrong

  • (a) · your answer Light does not directly convert CO2 to sugar; a hydrogen donor is needed.
  • (c) · your answer CO2 is not split; water is.
  • (d) · your answer Oxidation of glucose is respiration.
NCERT point: General equation: 2H2A + CO2 → 2A + CH2O + H2O.
What is wrong?
Thank you! We will check this question.
Practise Photosynthesis in Higher Plants
Take a free 15-question NEET Biology test on this chapter. Timed, scored instantly.
Start free test

Similar questions

According to van Niel, when the hydrogen donor is H2S, the oxidised product is Within mesophyll cells, chloroplasts usually line up along the cell walls. This helps them to In a leaf, the largest number of chloroplasts is usually found in the